GB2008897A - Data transmission method and apparatus - Google Patents

Data transmission method and apparatus

Info

Publication number
GB2008897A
GB2008897A GB7837392A GB7837392A GB2008897A GB 2008897 A GB2008897 A GB 2008897A GB 7837392 A GB7837392 A GB 7837392A GB 7837392 A GB7837392 A GB 7837392A GB 2008897 A GB2008897 A GB 2008897A
Authority
GB
United Kingdom
Prior art keywords
station
data signal
synchronisation
receiver
data transmission
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
GB7837392A
Other versions
GB2008897B (en
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens AG
Original Assignee
Siemens AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Siemens AG filed Critical Siemens AG
Publication of GB2008897A publication Critical patent/GB2008897A/en
Application granted granted Critical
Publication of GB2008897B publication Critical patent/GB2008897B/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/005—Control of transmission; Equalising
    • G—PHYSICS
    • G08—SIGNALLING
    • G08G—TRAFFIC CONTROL SYSTEMS
    • G08G1/00—Traffic control systems for road vehicles
    • G08G1/123—Traffic control systems for road vehicles indicating the position of vehicles, e.g. scheduled vehicles; Managing passenger vehicles circulating according to a fixed timetable, e.g. buses, trains, trams
    • G08G1/127—Traffic control systems for road vehicles indicating the position of vehicles, e.g. scheduled vehicles; Managing passenger vehicles circulating according to a fixed timetable, e.g. buses, trains, trams to a central station ; Indicators in a central station
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q9/00—Arrangements in telecontrol or telemetry systems for selectively calling a substation from a main station, in which substation desired apparatus is selected for applying a control signal thereto or for obtaining measured values therefrom

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Train Traffic Observation, Control, And Security (AREA)
  • Radio Relay Systems (AREA)

Abstract

In a data transmission system in which a first station can call up a second so as to receive a data signal from the second station, the first station causes its receiver to accept the data signal only after a predetermined time VZ since the first station has sent a call-up signal to the second station. Thus the effects of mis-synchronisation of the first station receiver due to interference signals preceding the data signal, can be avoided and the synchronising word SY2 preceding the data signal can be much shorter than in known systems so saving transmission time. The synchronisation of the receiver is held in dependence on the enabling for data signal reception so that, during the latter, correct synchronisation is assured. <IMAGE>
GB7837392A 1977-09-21 1978-09-19 Data transmission method and apparatus Expired GB2008897B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19772742497 DE2742497A1 (en) 1977-09-21 1977-09-21 PROCEDURE FOR DATA TRANSFER BETWEEN A CONTROL UNIT AND A NUMBER OF SUBSTATIONS

Publications (2)

Publication Number Publication Date
GB2008897A true GB2008897A (en) 1979-06-06
GB2008897B GB2008897B (en) 1982-01-20

Family

ID=6019533

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7837392A Expired GB2008897B (en) 1977-09-21 1978-09-19 Data transmission method and apparatus

Country Status (9)

Country Link
BE (1) BE870658A (en)
DE (1) DE2742497A1 (en)
DK (1) DK416078A (en)
FR (1) FR2404233A1 (en)
GB (1) GB2008897B (en)
IT (1) IT1098473B (en)
LU (1) LU80256A1 (en)
NL (1) NL7809483A (en)
SE (1) SE7809784L (en)

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB422468A (en) * 1933-06-09 1935-01-09 Labouchere Hillyer Bainbridge Improvements in and relating to wireless signalling
GB552482A (en) * 1940-12-27 1943-04-09 Marconi Wireless Telegraph Co Improvements in electric signal-communication systems
GB590711A (en) * 1944-02-19 1947-07-25 Hazeltine Corp Wave-signal transmitting and receiving system of the radar type
GB862485A (en) * 1958-05-12 1961-03-08 Bendix Corp Distance measuring system utilising radiant energy
US3341845A (en) * 1964-11-13 1967-09-12 Thomson Houston Comp Francaise System for automatic radio transfer of digital information and for distance computation
GB1310679A (en) * 1969-07-31 1973-03-21 Marconi Co Ltd Monitoring arrangements
DE2549635C2 (en) * 1975-11-05 1979-03-08 Siemens Ag, 1000 Berlin Und 8000 Muenchen Method for data transmission with two-frequency modulation and modem; Implementation of the procedure

Also Published As

Publication number Publication date
DE2742497A1 (en) 1979-03-29
NL7809483A (en) 1979-03-23
FR2404233A1 (en) 1979-04-20
BE870658A (en) 1979-03-21
LU80256A1 (en) 1979-06-01
GB2008897B (en) 1982-01-20
IT1098473B (en) 1985-09-07
DK416078A (en) 1979-03-22
SE7809784L (en) 1979-03-22
IT7827821A0 (en) 1978-09-19

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee